maybe reduce the ghosting in the first place because, honestly, once you get ghosting, forget it. i mean, and i should say, too, you know, i have almost 30 years' training in materials and methods and everything and i work specifically on, you know, i've worked in museums. i still get ghosting every once in a while. it's not a perfect world. it is really tough not to -- the damage is done when the graffiti goes on. so, sometimes we have to realize that, too. and we're just -- we're fighting an uphill battle in trying to find the right materials and methods in order to, you know, remove or abate. just one quick comment on antigraffiti coatings for those in the talk. this is a repeat. but we have to be very careful in selecting those materials and methods as well because sometimes just the coating alone can do more damage to historic fabric than not having it. so, we have to be looking at other strategies besides what i call it, what glue do i use. we have to be looking at strategies more on the prevention end.